Petra's Handler in the SWA and Intelligence-Gathering Specialist
Alessandro was brought into the Social Welfare Agency to serve as infiltration and intelligence-gatherer for the agency's missions, as well as serving as the handler of Petrushka. He was trained in his craft by a woman called Rossana serving the Public Security Division, who took interest in the young man's hobby of observing people and figuring out their identity through appearance and mannerisms. The woman's influence on Sandro is such that he has amassed a collection of books and other written material to research on people and their habits. Sandro was also known to have a reputation of being a womanizer, as he was known to sleep with women during his missions and there is the possibility he might have consummated a romantic affair with Rossana.
When brought into the Social Welfare Agency, Sandro displayed little interest in the selection and customization processes of choosing his cyborg partner as he left it to the SWA to do everything for him, so long as the girl chosen wasn't a redhead. This condition was ignored by Petra's surgeon deliberately, possibly as payback for Sandro's lack of serious commitment to the selection process. When Petra became Sandro's partner, she was taught Sandro's trade in infiltration which involved taking on disguises, surveillance and feigning friendliness to the enemy. He also tried to encourage her to smoke and swear, the latter being a problem for Petra since insulting her handler led her to suffer mild health problems thanks to her conditioning. Overtime, the two would develop a close relationship with one another which eventually becomes romantic.